Skyline Drive: Milepost 25.1 to 40.0
Marys Rock Tunnel
The tunnel, 670 feet long, was
bored through the solid granite of Marys Rock in 1932. Although
justified as avoiding the necessity of creating an expensive cut on
the existing slope and filling the down slope areas, thus creating a
massive man-made, visual feature, it has been suggested that the
tunnel was built as a challenge to Bureau of Public Roads and
National Park Service landscape architects.
The tunnel was partially lined with
concrete in 1958 to alleviate the formation of icicles in winter and
water seepage in summer, a partially successful effort.
This picnic area is open
year-round. It is large and scenic, offering families a pleasant
place for relaxing. There are picnic tables with grills nearby;
accessible sites are available. Restrooms (open except in cold
months) are accessible with assistance.